It was a less than impressive overall performance from both sides, who struggled to convert chances, with 19 shots off target between the two teams.

The Wanderers' Michael Beauchamp told Grandstand his team had expected a tough outing against the Reds.

"We knew Adelaide was a different side this season, and they showed it tonight, they put us under a lot of pressure," Beauchamp said.

"But ... we fought until the end, even when we were 1-0 down."

Beauchamp said he wasn't concerned at any stage that the Wanderers would fail to peg back the visitors after going behind.

"We've worked hard in the preseason ... we knew we had the legs, if we stuck to our gameplan the goals would come," he said.

Adelaide dominated possession, but it was the Wanderers who had a number of early chances.

United scores surprising opening goal

In the end it was United that opened the scoring in the 55th minute with an odd sort of goal.

Jeronimo Neumann hit a half-cross, half-shot which bounced into the box and was touched in by fellow Argentinian Marcelo Carrusca with the Wanderers' defence caught napping.

The home side was level just six minutes later, however, as Juric fired a brilliant low shot past Eugene Galekovic into the right-hand corner of the Adelaide net.

Iacopo Lo Rocca looked to have set up the winner when he crossed beautifully from the right into the path of Shinji Ono, but the Japanese star could not connect properly, sending it skywards into the stands.

The home side made amends soon afterwards, however, grabbing the winner with 11 minutes left when Juric got on the end of a cross from Jerome Polenz to nod home from close range.

A supportive home crowd of 16,279 at Parramatta Stadium got behind the Wanderers, and Beauchamp told Grandstand the players loved playing in front of the Red and Black Bloc.

"The crowd is fantastic," he said.

"You don't see this that often even in Europe - it's great to get the three points not only for yourselves but for the fans."

Free trade is the oldest argument in federal politics and the issue that literally defined the federation era but opposition exists to the TPP, courtesy of the Investor-State Dispute Resolutions clause.